why i see hashtags from random people from other servers. it's good, but i am confused

@crown I already described this: when someone on your server follows someone on a foreign server they they _pull_ their messages and they became "locally public".
In _theory_ there _could_ be relays which would send _all_ public messages on a sever to any server interested, but most AP relays are dead or closed, and I don't know how much resources a large site consumes anyway.